Sun City West, AZ: reliable drinking water, above-average safety record, few violations.

Data: EPA SDWIS Last verified: 2026-06-03

Overview

We track water quality and home safety data for 2 ZIP codes in Sun City West, Arizona, covering 1 community water system serving approximately 27,185 people.

2 of 2 ZIP codes (100%) have recorded EPA violations. All violations are monitoring/reporting type.

Home Safety Score

Average Home Safety Score for Sun City West: B (73/100)

The score combines three factors:

Factor	What It Measures
Water Quality	EPA violations and compliance history
Lead Levels	90th percentile lead concentration vs EPA action level
Radon Risk	EPA radon zone classification

Water Sources

Sun City West water systems draw from: Groundwater.

Lead & Copper

• Lead data: not yet available for Sun City West
• 0 ZIP codes exceed the EPA lead action level

Radon Risk

Dominant radon zone: Zone 2 (Moderate Risk)

• Zone 1 (High): 0 ZIP codes
• Zone 2 (Moderate): 2 ZIP codes
• Zone 3 (Low): 0 ZIP codes

The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.

Top Contaminants

Areas with Most Violations

All ZIP Codes in Sun City West

• 85375 [B] — 2 violations
• 85376 [B] — 2 violations

Data Sources

• Water quality: EPA Safe Drinking Water Information System (SDWIS)
• Lead/copper: EPA Lead and Copper Rule sampling data
• Radon: EPA Map of Radon Zones

Updated daily.

How Remediation Costs Compare in Sun City West

Across Sun City West, the equity share taken up by estimated remediation is small — a favorable ratio for most property owners.

Median Home Value

$350,700

Est. Remediation

$1,000

Remediation as % of home value 0.3%

Remediation costs in Sun City West are relatively low compared to home values. The $400–$1,700 estimated range is a small fraction of median property value. Home values are 15% above the Arizona average.

Sun City West: Flood History & Water Damage Risk

Flood risk in Sun City West occupies the middle ground: 2 NFIP claims and 50% of local ZIP codes within FEMA flood zones. At that level, the risk pathways connecting flooding to water quality — treatment system stress, well infiltration, distribution backflow — become relevant considerations during significant flood events, even if day-to-day water quality is unaffected by flood history.

2

Total FEMA Flood Claims

$1,230

Avg Claim Payout

50%

ZIPs in FEMA Flood Zones

Sun City West has a moderate flood history with 2 FEMA claims averaging $1,230 per payout. 50% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.

How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$1,000</strong> remediation cost per household.

Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.

Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.